Side bearing for truck-bolsters.



M. CARR.

SIDE BEARING FOR TRUCK BOLSTERS.

APPLICATION FILED SBP'I.13,1907.

907,005. Patented Dec. 15, 190.8.

; III/IIIIIIIIIJIIIIIIIII j? L A\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\maintained.

* UNITED sTATEs PATENT OFFICE.

MATTHEW CARR, OF CHICAGO, ILLINOIS, ASSIGNOR OF SIXTY-FIVEONE-HUNDREDTHS TO JOSEPH C. CARRY, OF CHICAGO, ILLINOIS.

SIDE BEARING FOR TRUCK-BOLSTEBS.

Specification of Letters Patent.

Patented Dec. 16, 1908.

Application filed. September 13, 1907. Scrialfloi 392,692. I

Theobjcct of this invention is to provide a side bearing for truckbolsters which will reduce the friction on the bolster occasioned by aturning of the truck as a car is drawn around a curve in the track, andwhich will provide a spring bearing adapted to maintain aconstantcontact against the under surface'of the car body, wherebyexcessive side rolling or oscillation of the car will be prevented.

Another object of the invention is to reduce the wearing due tofriction, so that the propertbalance for the car will always be In rigidside bearings of the ordinary style a heavy strain is put on the enginein rounding curves by reason of the excessive friction caused by theswing or turn of the truck, and this is more especially true in the caseof heavy modern cars of steel construction, which excessive friction.greatly reduces the draftcapacity of the engine and necessitates theemployment of a smaller number of cars than would be otherwise employed.

The ob 'ect of the present invention is to obviate the difficulty abovenoted and enable an engine to draw a greater number of cars than wouldotherwise be the case.

The invention consists in the features of construction and combinationof parts here-' inafter described and claimed.

In the drawings Figure 1 is a sectional elevation of a truck bolster,showing the side bearings of the present invention;"Fig. 2 an interiorplan view of the side bearings, the

roller bearing plate being removed; Fig. 3 a

cross sectional view of the same; Fig. 4: a longitudinal sectional viewof the same in normal osition and Fig. 5 a similar view, showing esprings subjected to the weight of a heavy load. i

The side bearing of the present invention is capable of being applied toa truck of any ordinarytypc having a truck bolster 6 pro- 'idcd with acenter bearing 7 of ordinary construction. The side'bearings 8 aresecured near the outer ends of the truck bolster and are adapted tobalance the weight of the car body 9 which rests'uponthe center bearing.

The side bearing comprises a'. box having side walls 10 which arepreferably curvedv on the arc of a circle having the center bearing as acenter, and the side Walls are connected by end walls 11 which gives theWhole structure a box-like formation. Thc-bearim box rests upon a bedplate 12 provided with lioles 13 for the attachment of the-bed platctothe top of the truck bolster. The bearingbox is provided near each endwith companion outwardly bulged semi-cylindrical socket walls 14, whichprovide companion spring sockets 15. Each. of the spring sockets issupplementcd by vertical guide lugs 'lfiwhich project inwardly into theinterior of the bearing box and form vertical guidcways for thereception of spring journal blocks 17 each of which is provided on itsinner upper surface with a curved bearing recess 18, and is prov videdon its outer portion with a rounded semi cylindrical boss -19 adapted toenter the spring socket.

The journal block has depending therefrom a stud 20 which is encircledbya vertical coil spring 21 the lower end of which enters a recess 22 inthe floor of the box, which serves to position the spring and preventits dis placement. Each pairof bearing blocks providos a mounting for aroller 23 provided with journals 24 supported Within the curved journalrecesses 18. in the bearing blocks." The two rollers serve to support amovable bearing plate 25 having curved depending side flanges 26 whichoverhang the upper edges of the box. The movable bearing pl ate isprovided in its center with a de end-.

111 fiat spring 27 the side edges of whic are held betweeninwardly'extending lugs128 on the side walls of the box, whicharrangement crmits the movable bearing plate to travel back and forthover the rollers against the tension of'the spring asuiiicient distanceto accommodate the movement of the car trucks with respect to the carbody. In

order to prevent displacement of the movable bearing plate the latter isprovided at its ends with depending cars 29 which'cooperate withoutwardly extending tongues 30 on the box. The cars 29 are of sufiicientlength to extend below the lower edge of the tongues 30 and I 5 -uponthe through the ears are entered cotter. pins 31 which are ofsuflicientlength to extend across the box beneath the tongues '30, whichar rangement serves to lock the parts together and at the same timepermits the necessary freedom of movement. The movable bearing platecooperates with a fixed bearing plate 32 on the under surface of the carbody.

In use, when the car is light, the fixed bearing plates will rest ineasy contact with the movable bearing plates, and the springs within thebearing boxes will not be compressed to any great extent, and therollers will be raised to their limit. \Vhen the car is loaded therollers will be depressed and the 'sprilngs compressed to sustain theincreased loa body will be balanced by the action of the springs, whichserve to prevent excessive side rolling or vibration since any tendencytoward rolling will be counteracted by the increased compression of thesprings on the side of the truck toward which the car body tends toroll. 'When rounding a curve the turn of the trucks will cause themovable bearing plate, which is in frictional contact with the fixedbearing plate,

' rollers a sufficient distance to accommodate the turn of the trucks,and this rolling will minimize the friction to such an extent that theengine will be relieved from excessive strain and enabled to haul a muchheavier load than would be the case in drawing around a curve heavilyloaded cars having frictional side bearings of ordinaryconstruction.

What I claim as new and desire to secure.

by Letters Patent is:

1. In a side bearing, the combination of a 4'0 bearing box, a rollerwithin the bearing box provided with outwardly extending journals,

journal blocks upon which the journals are mounted, springs supportingthe journal blocks, a movable bearing roller, and a spring secured tothe "ibearin'g'plate and adapted to return the During the transit of thecar the car to roll along the plate mounted same to normal position,substantially as described. 4

2. In a side bearing, the combination of a box, a pair or rollersmounted within the box and upwardly projecting therefrom, slidablymounted bearing blocks within which the rollers are journaled, coilsprings within the box upon which the journal blocks are sup-.

ported, a movable bearing plate resting upon the rollers, and a flatspring depending from the movable bearing plate and engaging with thewallsof the box for returningthe bearing plate to normal position,substantially as described.

3. In a side bearing, the combination of a box provided on its sideswith two pair of guideways, journal blocks slidablymounted within theguideways and provided with depending studs, coil springs encircling thestuds and adapted to support the journal. blocks, rollers journaledwithin the journal blocks, and a movable bearing plate resting upon therollers and provided with depending side flanges overhanging the u perside edges of the box, substantially as escribed. 4. In a side bearing,the combination of a box provided with guideways, a pair of rollersmounted within the box, a pair of bearing blocks for each roller,located on opposite sides .of said roller and each comprising anenlarged head slidably mounted within the adjacent guideway and providedin its u per face with a recess and a stud depending from said head,journals outwardly extending from the rollers and entered within saidrecesses, a coil spring surrounding each of the studs, a movable bearingplate resting upon the'rollers, stops for limiting the movement of thebearing plate, and a spring connected with the bearing plate forreturning it to. normal position, substantially as described.

WALKER BANNING, PIERSON W. BANKING.

